Do we know Onaga Ageha exact age? I know Shiba Sakura is 22 years old

he's probably like 12-15 years old. i'm assuming he's a middle schooler lmao since sakura's friend asks "a highschooler?" and sakura responds with something else. definitely not a primary schooler (i hope) since his school clothes don't look like it (?) not too sure. i don't really know what japanese school uniforms look like lmao

Thanks! That was my guess as well